Exception suggestion

rgb

When you catch a exception
You have the message error only, you don't know where are the error else reading stacks
like objo doc:

Catch ex As IOException

  Print("Error: " + ex.Message)

  For Each frame As StackFrame In ex.StackFrames

    Print("  " + frame.name + " (" + frame.FileName + ":" + frame.LineNumber.ToString() + ")")

  Next

In my code error show:
Error: Unexpected end of stream.
App.ReadStr (App:513)
App.LoadLecture (App:1401)
App.initData (App:35)
App.Opening (App:102)

It's interesting it's the last stack Call he made error:
App.ReadStr

My suggestion:
Add a property string DetailledMessage who display text last stack
like:

print(ex. DetailledMessage)

and show
App.ReadStr(App:513)

Garry

Good suggestion. I’ve implemented this for the next release, with a slightly different API.

https://feedback.objo.dev/feature/1358

Rather than adding a DetailedMessage string, RuntimeException now has a read-only ThrowSite property. It returns the StackFrame where the exception originated:

Try
    LoadData()
Catch ex As IOException
    Print(ex.Message)

    If ex.ThrowSite <> Nothing Then
        Print(ex.ThrowSite.ToString())
    End If
End Try

This produces output such as:

Unexpected end of stream.
App.ReadStr (App:513)

ThrowSite is equivalent to StackFrames[0], but avoids manually indexing and formatting the stack when you only need the failure location.

I also added StackFrame.ToString(), which formats any frame as:

Name (FileName:LineNumber)

The existing Message property remains unchanged, and StackFrames is still available when you need the complete call stack:

For Each frame As StackFrame In ex.StackFrames
    Print(frame.ToString())
Next

Rethrowing an exception preserves its original ThrowSite and stack frames. Thanks for the suggestion!

rgb

Very cool, save time 🙂